Umm.. numb butt and toes from riding..

Went on a 2+ hour ride this morning. Lots of long, steep uphills. I have a women's Specialized seat on my bike that I've had for 2 years now and has been quite comfortable so far. I noticed today my butt bone was starting to feel like I was pinching a nerve on my left buttocks. I haven't had this happen before, and I go on rides that long a few times a week. Then my toes (3rd and 4th) on my left foot were starting to go numb. They weren't hurting, just numb. It was starting to get really uncomfortable, so I would shift around in the seat.

I took a couple breaks, and it didn't really do much. My shoes weren't tight either. Maybe just too long in the saddle combined with a tough ride made this happen? I'm thinking of moving the cleat down a bit (towards my heal) to alleviate any excess pressure near the toes. Any ideas, or have you experienced this?

I haven't got clipless, but sometimes my big toe (left foot) becomes numb. I think this happens because on the down stroke my toes are lower than my heel. I alleviate the numbness by making sure my heel is lower than my toes for a few downstrokes. Works for me.